LA42031

No.A0394-3/7

Block Diagram

Test Circuit

* LA42031 employs the zero-bias type input circuit, with the input pin potential being nearly zero (about 0.01V).

Accordingly, the polarity must be determined according to the DC potential of a circuit connected to the previous stage

of LA42031.

Ripple

Filter

Input amplifier

Output amplifier

VCC/ground shorting protection circuit

Load shorting protection circuit

Thermal protection circuit

VCC

Standby

MUTE

IN

PRE

GND

PWR

GND

+OUT2

-OUT2

1

7

5

10

6

3

4

8

9

Ri=

30k

Ω

N.C.

Ripple

Filter

PRE

GND

PWR

GND

IN

STBY MUTE

+OUT

N.C.

N.C.

-OUT

N.C.

VCC

+

+

+

1

2

3

4

5

6

7

8

9

10

11

12

13

C4

1000

μF

/16V

C3

10

μF

/10V

C1

4.7

μF

/10V

C2

47

μF

/16V

+5V

C5

0.1

μF

RL

R4

2.2

Ω

R1

15k

Ω

C6

0.1

μF

R5

2.2

Ω

LA42031

*